Quarterly report pursuant to Section 13 or 15(d)

Warrants and Derivative Liabilities (Details 5)

v3.19.1
Warrants and Derivative Liabilities (Details 5) - Pricing Model - Series B warrant
Mar. 31, 2019
Percent
USD_per_warrants
Dec. 31, 2018
Percent
USD_per_warrants
Class of Warrant or Right [Line Items]    
Warrants and rights outstanding measurement input | USD_per_warrants 0.69 0.4
Dividend yield    
Class of Warrant or Right [Line Items]    
Warrants and rights outstanding measurement input 0 0
Volatility factor    
Class of Warrant or Right [Line Items]    
Warrants and rights outstanding measurement input 92.1 93
Risk-free interest rate    
Class of Warrant or Right [Line Items]    
Warrants and rights outstanding measurement input 2.35  
Risk-free interest rate | Minimum    
Class of Warrant or Right [Line Items]    
Warrants and rights outstanding measurement input   2.786
Risk-free interest rate | Maximum    
Class of Warrant or Right [Line Items]    
Warrants and rights outstanding measurement input   2.789
Expected term (years) | Minimum    
Class of Warrant or Right [Line Items]    
Expected Term 1 year 4 months 21 days 1 year 7 months 21 days
Expected term (years) | Maximum    
Class of Warrant or Right [Line Items]    
Expected Term 1 year 4 months 28 days 1 year 7 months 24 days